Can someone explain the concept of adjusting intake and exhaust valves. I'm confused on which is which
Ah, sounds like you are very new to this, which is fine, you have to start somewhere. How much of a description do you need?
On the V6, the inlets are nearer the center of the engine. What you are doing is setting the clearance between the screw in the end of the rocker arm and the tip of the valve, then locking the screw in place with the locknut.
It is very important when doing this to check the clearance after you have tightened the locknut. You do this by sliding a feeler gauge thru the clearance between the screw and the valve. Sliding means there is a very slight drag on the feeler as it goes thru the gap and the next size up feeler won't go thru the gap. You can force the feeler thru, but this will give you a wrong value.
If after you take the feeler gauge out and you can feel no gap when you lift the rocker arm up and down by hand, you have done it wrong and need to have another go. With no clearance at the valve tip the rocker arm will quickly wipe all the oil of the cam and mess up the camshaft - as well as giving you low compression and a good chance at burning a hole in the valve itself.
In the photobucket guide, be sure to open the text to the pictures and read it. I don't explain everything, but hopefully you can figure out what I didn't say.
